HTML调用PC摄像头
http://www.oschina.net/code/snippet_2440934_55195
使用HTML５中的canvas和video技术实现调用PC摄像头
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Html代码 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>HTML5调用电脑摄像头实例</title> <script type="text/javascript"> window.addEventListener("DOMContentLoaded", function() { // Grab elements, create settings, etc. var canvas = document.getElementById("canvas"), context = canvas.getContext("2d"), video = document.getElementById("video"), videoObj = { "video": true }, errBack = function(error) { console.log("Video capture error: ", error.code); }; // Put video listeners into place if(navigator.getUserMedia) { // Standard //alert("支持navigator.getUserMedia"); navigator.getUserMedia(videoObj, function(stream) { video.src = stream; video.play(); }, errBack); } else if(navigator.webkitGetUserMedia) { // WebKit-prefixed //alert("支持navigator.webkitGetUserMedia"); navigator.webkitGetUserMedia(videoObj, function(stream){ video.src = window.webkitURL.createObjectURL(stream); video.play(); }, errBack); } else if(navigator.mozGetUserMedia) { // Firefox-prefixed //alert("支持navigator.mozGetUserMedia"); navigator.mozGetUserMedia(videoObj, function(stream){ video.src = window.URL.createObjectURL(stream); video.play(); }, errBack); } // 触发拍照动作 document.getElementById("snap").addEventListener("click", function() { context.drawImage(video, 0, 0, 640, 480); }); }, false); </script> </head> <body> <video id="video" width="640" height="480" autoplay></video><br> <button id="snap" >点击拍照</button> <br> <canvas id="canvas" width="640" height="480"></canvas> </body> </html> |
